US Bridges

Nash Road over Sawmill Creek

Fair

Kenai Peninsula Borough, Alaska · Mile Point 2.0 · Structure no. 0855

Built
1989
36 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
80 ft
1 main span
Daily traffic
320
2020 count
Owner
State
State Highway Agency

About this bridge

Nash Road over Sawmill Creek is a prestressed concrete tee beam carrying Nash Road over Sawmill Creek in Kenai Peninsula Borough, Alaska. It was built in 1989, so it is 36 years old, older than the Alaska average of 35.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 320 vehicles a day, roughly 6% of them trucks, projected to reach 480 by 2039. The structure is 80 ft (24.4 m) long and 37 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesNash Road
CrossesSawmill Creek
LocationMile Point 2.0
RouteState Highway 495
StateAlaska
Coordinates60.12722, -149.37389
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.1 US tons
Inventory rating42.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20 + Mod
Structure length80 ft (24.4 m)
Longest span79 ft (24.2 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic320 (2020)
Projected traffic480 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nash Road over Sawmill Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Nash Road over Sawmill Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does Nash Road over Sawmill Creek carry?

About 320 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Nash Road over Sawmill Creek?

The structure is 80 ft (24.4 m) long with a longest span of 79 ft (24.2 m) and a deck 37 ft wide.

Who owns Nash Road over Sawmill Creek?

It is owned by the State Highway Agency.